Supplement of 112°
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68°
Free printable worksheet
Angles Practice Worksheet
Twenty problems with complementary, supplementary, vertical, and algebraic angle relationships.
Middle School MathGrades 6-83 pagesAnswer key included
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What this worksheet includes
- Twenty problems with complementary, supplementary, vertical, and algebraic angle relationships.
- 3-page printable PDF with a complete answer key
- Designed for Grades 6-8 middle school math practice
- Available as an immediate free download with no email required
How to use it
Use this angles practice worksheet for guided practice, independent review, homework, tutoring sessions, or a quick skills check. The spacious layout is designed to leave room for students to show their work rather than guess from crowded answer choices.
After students finish, compare their reasoning with the included answer key. When an answer is incorrect, have the student locate the first step where their work changed direction before trying the problem again.
Who this practice is for
This resource is designed for grades 6-8 students working on middle school math. Teachers, tutors, homeschool families, and parents can preview the first page before deciding whether the level and spacing fit the student.
Looking for a broader sequence? Browse all Middle School Math worksheets.
Topic guide
How to approach angles practice
Angle relationships allow unknown measures to be found without direct measurement. Complementary angles total 90°, supplementary angles total 180°, and vertical angles are congruent.
When parallel lines are cut by a transversal, corresponding and alternate interior relationships provide additional equal or supplementary pairs.
Learning objectives
- Find complementary and supplementary angles
- Use vertical-angle relationships
- Solve angle equations
Skills to review first
- Angle vocabulary
- One-step equations
- Reading diagram markings
Worked example
Follow the reasoning step by step
An angle is complementary to 34°. Find its measure.
- Complementary angles total 90°.
- Write x + 34 = 90.
- Subtract 34 from both sides.
- Check that the two measures total 90°.
Solution: 56°.
Try before downloading
Three sample problems
Work each problem, then open the answer to check your result.
One vertical angle is 73°.
Show answer
The opposite angle is 73°.
Adjacent linear-pair angles are 3x and 2x.
Show answer
x = 36; angles 108° and 72°.
Error check
Common mistakes to watch for
- Using 180° for complementary angles
- Assuming adjacent angles are congruent
- Trusting drawing scale instead of given relationships